• Show profile name as - allows to select either “username” or “real name” that will be used site wide.
• Confirm email - when turned on users will have to verify email addresses before accessing the site.
• Avatar image crop size - size of the avatar shown in all listings. You will also need to change your theme CSS.
• Big avatar image crop size - avatar size shown on profile page.
• Default avatar image - avatar that will be displayed if user doesn't upload his own image.
• Avatar upload - let users upload avatar on registration
  • display - makes “Avatar” field optional on registration field.
  • display and set required - makes “Avatar” field required on registration field.
  • hide- removed “Avatar” field from registration page.

Here you can specify settings for the content users will be adding to your site.